Nigerian city losing landmark wall

Kano, the second largest city in Nigeria, was once a bustling commercial hub and centre for Islamic learning. For centuries it was protected by a wall that helped define its identity and preserve its culture. But as Al Jazeera's Rawya Rageh reports from Kano, much of the city's heritage is crumbling. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter   / ajenglish   Find us on Facebook   / aljazeera   Check our website http://www.aljazeera.com/